Beta-acetyl-alkyl-dialkylamins.



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To all whom it may concern:

Be it known that we, GEORG MERLING, O'rro CHRZESGINSKI and HUGO KoHLnR, doctors of philosophy, chemists, citizens of the German Empire, residing, respectively, in Elberfeld and'Leverkusen, near Cologneon-the-Rhine, Germany, have invented new and useful Improvements in Beta-Acetyl- Alkyl-Dialkylamins, of which the following is a specification.

The present invention concerns the production of the hitherto unknown keto compounds of the formula:

CH CO-CH(R).CHz-N(R')g (Rzhydrogen or alkyl, R'zalkyl e. 9., ethyl) which have proved to be valuable intermediate products for the manufacture of erythrene and its hoinologues. The process for their production proceeds in the same manner as described in the specification of the Patent No. 1,070,622. These reactions proceed e. 9. according to the following equations:

(Rzhydrogenor alkyl, Rzalkyl e. g.

ethyl.) 1

In order to illustrate the new process more fully the following examples are given, the parts being by weight:

Example 1: Production of beta-acetylethyl-diethylamin from tetraethyldiaminomethane and acetone. 7 50 parts of aqueous formaldehyde per cent.) are gradually dropped into 32% parts of aqueous diethylamin solution per cent.) which is being stirred and cooled and 2000 parts of 40 acetone, 400 parts of baryta water (saturated at ordinary temperature) and 500 parts of water are then added. After 20 days heating from 25 to 30 C. bicarbonate is added to the brown solution in order to 45 remove the baryta. Barium carbonate is removed by filtration. The oil is separated with potash from the filtrate and dried over potash. The excess of acetone is removed by distillation in oacuo and the remaining mixture of bases is decomposed by a fractional distillation in oacuo to beta-acetyl- AND o'rrozcnnznsqmsm H A 'rorMrnnNFABR-rKE 15mm conronngromo-FijGnRMnN o nryn-atxirlrmahmlilli t Specification of Letters fatent.

Patented Jan. 26, 915..

Application filed June 5, 1913. Serial No. 771,872.

ethyldiethylamin (fractions from about 60-80 C. 16 mm.). This base is a colorless oil having an intense ammoniacal smell, difficultly soluble in water and boils at 7 2-76 C. (16 mm).

Example 2: Production of beta-acetylpropyldiethylamin with the aid of tetraethyldia-minomethane and methylethylketone.

292 parts of an aqueous diethylamin solution (50 per cent.) are gradually dropped into 75 parts of aqueous formaldehyde (40 per cent.) while well stirring and cooling. This mixture forming two layers, is mixed with 210 parts of methylethylketone and boiled on the reflux condenser for so long a time as a test portion after acidulation with acetic acid is not any more rendered turbid by a solution of anilin acetate which requires about some hours. The solution is then dehydrated with potash and worked up in the same manner as described in Example 1, whereby an analogous result is obtained. The new beta-acetylpropyldiethylamin of the formula:

is a colorless oil having a little ammoniacal smell, diflicultly soluble in water and boils at 7778 C. (16 mm.).

We claim 1. As new products the beta-acetylallryldialkylamins of the formula graphically represented om-co-cnmycm-n 1r 4. As new Froduct the I Jeh-noetylethyldiethylamin o the iurmuln CHp-CMHr-CEHJCIO)! 5 which is a colorless oil having ammoniacal smell, dilficultly soluble in water and boils at IQ-76 C. (16 mm.), mb

s'tantiaHy as described.

In testimony whereof we have b anhmnaur net hands in the pm of two sub- 10 surib g Wilma-u.

GEOBG Mama. [LL] OTTO CHRZESCINSKI. [1. s.]

HUGO KOHLER. Witnesses:

Aim Num. 

